| abstract |
Provided is a refrigeration apparatus that uses a refrigerant that acts as an oil carrier without using a refrigerant that is subject to Freon regulation and that can achieve an ultra-low temperature of -150 ° C. According to the present invention, a refrigerant discharged from a compressor is condensed and then evaporated to evaporate the refrigerant from a high temperature side refrigerant circuit 2 and a low temperature side refrigerant circuit 3 constituting an independent refrigerant closed circuit 1 that exhibits a cooling action. In the refrigeration apparatus in which the cascade condenser 25 is configured by the evaporator 14 of the high temperature side refrigerant circuit 2 and the condenser 23 of the low temperature side refrigerant circuit 3, the low temperature side refrigerant circuit 3 is connected to R245fa, R600, R404A, R508A, R14, Non-azeotropic refrigerant mixture including R50, R740, or non-azeotropic refrigerant mixture including R245fa, R600, R404A, R23, R14, R50, R740, or R245fa, R600, R404A, R508B, R14, R50, R740 Enclosed non-azeotropic refrigerant mixture. [Selection] Figure 1 |